FR2441235B3 - - Google Patents

Info

Publication number
FR2441235B3
FR2441235B3 FR7927678A FR7927678A FR2441235B3 FR 2441235 B3 FR2441235 B3 FR 2441235B3 FR 7927678 A FR7927678 A FR 7927678A FR 7927678 A FR7927678 A FR 7927678A FR 2441235 B3 FR2441235 B3 FR 2441235B3
Authority
FR
France
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7927678A
Other languages
French (fr)
Other versions
FR2441235A3 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Original Assignee
EMI Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EMI Ltd filed Critical EMI Ltd
Publication of FR2441235A3 publication Critical patent/FR2441235A3/fr
Application granted granted Critical
Publication of FR2441235B3 publication Critical patent/FR2441235B3/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/12—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by magnetic means
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/087—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors flux-sensitive, e.g. magnetic, detectors
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Digital Magnetic Recording (AREA)
  • Credit Cards Or The Like (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
FR7927678A 1978-11-11 1979-11-09 Lecteur de documents magnetiques de securite Granted FR2441235A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7844183 1978-11-11

Publications (2)

Publication Number Publication Date
FR2441235A3 FR2441235A3 (fr) 1980-06-06
FR2441235B3 true FR2441235B3 (enrdf_load_stackoverflow) 1980-12-12

Family

ID=10500994

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7927678A Granted FR2441235A3 (fr) 1978-11-11 1979-11-09 Lecteur de documents magnetiques de securite

Country Status (4)

Country Link
US (1) US4328519A (enrdf_load_stackoverflow)
JP (2) JPS5567909A (enrdf_load_stackoverflow)
FR (1) FR2441235A3 (enrdf_load_stackoverflow)
GB (1) GB2035659B (enrdf_load_stackoverflow)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5736407A (en) * 1980-08-13 1982-02-27 Toshiba Corp Magnetic reproducer
JPS57123504A (en) * 1981-01-22 1982-08-02 Toshiba Corp Magnetic recording and reproducing system
JPS58166510A (ja) * 1982-03-29 1983-10-01 Toshiba Corp 磁気再生装置
GB2142765A (en) * 1983-07-04 1985-01-23 John William Hawkins Preventing unauthorised use of recorded information
WO1994002943A1 (en) * 1992-07-27 1994-02-03 Central Research Laboratories Limited Processing of recorded data
US5612528A (en) * 1992-07-27 1997-03-18 Central Research Laboratories Limited Processing of magnetically recorded data to detect fraud
WO1994018671A1 (en) * 1993-02-12 1994-08-18 Datacard Corporation Magnetic stripe read/write head
GB2324644B (en) * 1997-04-22 2001-09-12 Central Research Lab Ltd Apparatus for reading permanently structured magnetic records
GB9922517D0 (en) * 1999-09-24 1999-11-24 Thorn Secure Science Ltd A device for reading an elongate magnetic data carrier
CA2653651C (en) * 2005-09-19 2014-03-25 Venetec International Inc. Medical tubing securement assembly and methods of use
CN104575527B (zh) * 2013-10-08 2018-10-09 马维尔国际贸易有限公司 二维磁记录系统和方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027549A (en) * 1956-06-06 1962-03-27 Ibm Magnetic transducer
US3312372A (en) * 1964-05-28 1967-04-04 Veeder Industries Inc Secret coded card system
US3435443A (en) * 1968-03-05 1969-03-25 Molins Organisation Ltd Flux sensitive transducer with tuned resonant circuit
US4108366A (en) * 1974-01-02 1978-08-22 Monitron Industries, Inc. Apparatus for providing and sensing coded information
US4029945A (en) * 1975-08-27 1977-06-14 Stanley Electric Co., Ltd. Card and card reader apparatus therefor

Also Published As

Publication number Publication date
US4328519A (en) 1982-05-04
JPH0337122Y2 (enrdf_load_stackoverflow) 1991-08-06
FR2441235A3 (fr) 1980-06-06
GB2035659B (en) 1982-11-10
JPS5567909A (en) 1980-05-22
GB2035659A (en) 1980-06-18
JPS63195603U (enrdf_load_stackoverflow) 1988-12-16

Similar Documents

Publication Publication Date Title
FR2417057B1 (enrdf_load_stackoverflow)
DE2920996C3 (enrdf_load_stackoverflow)
FR2441235B3 (enrdf_load_stackoverflow)
FR2414651B1 (enrdf_load_stackoverflow)
FR2416899B1 (enrdf_load_stackoverflow)
FR2414844B1 (enrdf_load_stackoverflow)
FR2382762B1 (enrdf_load_stackoverflow)
AU3898778A (enrdf_load_stackoverflow)
AU3803078A (enrdf_load_stackoverflow)
FR2415226B1 (enrdf_load_stackoverflow)
FR2414254B1 (enrdf_load_stackoverflow)
AU73950S (enrdf_load_stackoverflow)
AU3892778A (enrdf_load_stackoverflow)
BG26460A1 (enrdf_load_stackoverflow)
BG25955A1 (enrdf_load_stackoverflow)
BG26017A1 (enrdf_load_stackoverflow)
BG26015A1 (enrdf_load_stackoverflow)
BG26014A1 (enrdf_load_stackoverflow)
BG26013A1 (enrdf_load_stackoverflow)
BG26012A1 (enrdf_load_stackoverflow)
BG26009A1 (enrdf_load_stackoverflow)
BG26008A1 (enrdf_load_stackoverflow)
BG26007A1 (enrdf_load_stackoverflow)
BG26006A1 (enrdf_load_stackoverflow)
BG26096A1 (enrdf_load_stackoverflow)